package com.leigang.springboot.netty.simple;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

/**
 * @author leigang
 * @version 1.0
 * @date 2022/7/23 21:37
 **/
public class NettyServer {
    public static void main(String[] args) throws InterruptedException {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            //创建服务端启动对象，配置参数
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.group(bossGroup, workerGroup) //设置两个线程组
                    .channel(NioServerSocketChannel.class) //NioServerSocketChannel作为服务器的通道实现
                    .option(ChannelOption.SO_BACKLOG, 128)  //设置线程队列得到连接个数
                    .childOption(ChannelOption.SO_KEEPALIVE, true) //设置保持活动连接状态
                    .childHandler(new ChannelInitializer<SocketChannel>() {//创建一个通道测试对象（匿名对象）
                        //给pipeline设置处理器
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new NettyServerHandler());
                        }
                    });  //给我们的workgroup 的eventLoop对应的管道设置处理器
            System.out.println("...服务器 is ready ...");
            //绑定一个端口并且同步， 生成 一个channelFuture对象
            //启动服务器
            ChannelFuture cf = bootstrap.bind(6668).sync();
            //对关闭的通道进行监听，并不是马上关闭通道
            cf.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

    }
}
